Fix directory-files{,-recur} detection of symlinks to dirs

Fix directory-files{,-recur} detection of symlinks to dirs

    * src/dired.c(dfr_inner): For the systems without d_type in
      dirent, the code did not try to detect symlinks to directories,
      preventing 'subdir from working.  Added same logic for that
      branch as in the case where d_type is present.

Signed-off-by: Nelson Ferreira <nelson.ferreira@ieee.org>